Dump truck



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R. E. SMITH DUMP TRUCK Filed Dec.

Feb. 24, 1931.

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24, 1931. R, E SMlTH 1,793,756

DUMP TRUCK Filed Deo. 25, 1927 '7 Sheets-Sheet 2 INVENTQR RALPH LSMITH,

R. E. SMITH DUMP TRUCK Feb. 24, 1931.

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Filed Dec. 23, 1927 R. E. SMITH DUMP TRUCK 7 Sheets-Sheet 4 FIG.4

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Filed Dec. 23, 1927 R. E. SMITH DUMP TRUCK 7 Sheets-Sheet 5 \\\\\w o a 39 i 32 2 4 0 g \m 53 5B 55 Je JNVENTQR RALPHasmn-Hl y BQ/i/nwwh A'r-roRNEYg' R. E. SMITH Feb. 24, 1931.

DUMP TRUCK Filed Dec. 25, 1927 '7 Sheets-Sheet 6 l5 a @w R. E, SMITH Feb. 24, 1931.

DUMP TRUCK Filled Deo. 2:5, 19.2"/

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,en-TURNER Patented Feb. Z4, 1931 v UNITED STATES PATENT OFFICE RALPH n. SMITH, or GALION, OHIO, AssIeNon To THEGALIION METALLIC VAULT COMPANY, on GALION, OHIO, A CORPORATION OF OI-IIO DUMP TRUCK Application filed December 23, 1927. Serial No. 242,051.

My invention relates to dump trucks.

It is the object of my invention to provide a: dump truck which may be positively elevated, controlled any point in its elevation, and positively lowered if-desired.

.It is a further `object to provide a dump truck which may be of.` the counterbalance type, which will lower of its own weight when dumped, and the elevating mechanism will `beadaptable to such an operation.

`It is an Object of my invention to provide positive power mechanism for elevating the load and providing a iiexible gearingor gear chain Vwhichwill` be flexible for nesting in telescopic" position,.but which will be rigid for elevation of the dump body. `Referring to-Ithedrawings:

Figure 1 is a side elevation of the truckin loadedposition. f

' 2o Figure 2is a side elevation of the truck in elevated position. I I Y Figure 3 is a detail viewY with the shafts in `section showing theI arrangement of the `elevating* chain. Figure 4 `is a detail end elevation of the gearing with` the Aworm driving gearing in section on line 4 4 ofFigure 5.`

Figure 5 is asectionl on the line 5 5 of Figure 4.

Figure V6 is a section on the line 6 6 of Figure k5. I

Figure 7 is a section on the line 7 7 of `Figure 3. I

Figure 8 is, asection along the line 8 8 of .Figure 9.

I. Figure 9 is a plan view of the forward end of the Operating mechanism. c I.

' `'Referring tothe drawings, 1 designates a' truck frame on whichis mounteda supplev mentary frame 2 having interconnecting cross members 8. These cross members serve to provide a rigid supplementary frame for sup porting the body and the pivots for the bod andthe associated gear mechanism.

I Mounted upon theside frames 2 `and transver-sely4 thereof 'arefa pair `of spaced channel transverse pivotal support 7; mountedin the I geanengaging teeth on one side with a smooth surfaceon the other side for engagement with o5 `a guiding roller, Or other similar means.

Thus the chain when not in use for elevating the body is telescoped within the nesting space provided for it between the side frames 2, where it is suitably supported upon the 7o supports 10. When the chain is elevated it is stilf and maintained in a rigid position and conditionso as to elevate the forward end of the body 6.

A bracket 11 having spaced ears 12 is con- 75 nected bya pivotpin 13 to a lug 14, which is connected by the pin 15 to the forward link 16 of the chain. This forward link 16 is one of a series of separate links which are connected together by the pivot pins 17. One side of the link is a flat surface 18 while the other is provided withteeth 19. The teeth 19 engage with the gear 20, which is driven by the shaft 21, while the other` flat surface 18 of the link is engaged by the smoothsurface roller 22. The links pass betweenthe gear 20 and i the roller 22 and are held in operative engagement with both. The roller 22 is mounte upon the shaft 23.

This `roller 22is provided with flanges 24 90` for engaging with the sides of the links.

Links25 connect the shafts f21 and 23, forming positioning members forthe gear 2() and roller 22. The shaft 21 is mounted in collars 26, which are spaced apart on either side of the arms 25 and gear 20. These collars are provided with bearing sleeves 27. The tWO collars are mounted upon a common foundation 28, which in turn ismounted upon interconnecting fore and `aft channel irons 29 10 i lrturnis operated bythe handle 54a.

which serve as supports for the gear mechanism.

T he shaft 21 carries ya worm wheel 30 within the housing 3l. rlhis worm wheel 30 is drivenby the worm 3,2 mounted on the stub axle 33, which is journaled in the casing at one end at 34,inathe casingr at and at the bottom of the gear boX 36 in detachable gear box end 37, as at 38. Ball bearings 39 and 40 serve to take thejthrust ofA the wormpgear 32,

while the ball bearings 41 and l42 take the v thrust of the shaft adjacent the bevel gears 43 I and 44, which are mounted thereon in spaced relationship in drivingengagement with the pinion 45 mounted on the driving shaft 46, which is connected to the engine of the truck.

47 is a ball bearing adapted to take the thrust due to the action of the gear 45.

f Between the two bevel gears 43 and 44 isa jclutchconsisting of a groovedV member 48 having laterally yprojecting shoulders 49* for engaging with corresponding shoulders 49ar of the respective ibevel gears 43 and 44, which are adapted otherwise to lturn loosely upon the shatt33. .This grooved clutch member 48 l 5,; thetruck;

rlhis clutch memberis maintained in either neutraler Vin either one of the driving `positions by the spring-pressed plug 55, actuated Y by the spring 56 engaging with the sides oic a notch end`57 ofthe depending latching member v58, which is formed'as a part of the yoke will be observed that this gear housing f lhas a detachable-bottom 37, held in position by the bolts59 so-that the structure maybe readily assembled or disassembled and may be readily ydrained (if-lubricant and cleaned.

Method of operation To operate this mechanism, the shaft 54 is shifted with theclutch-to bringthe clutch into engagement with one 'of theogears, "either 43 i or 44 depending upon the direction of-movement of the .truck body desired. Thereupon '--th-e chain will be-edbyy the gear 2O vertically if dumping is desired, while the chain will be guided by the engagement of theA roller 22 with the-back ofthe chain.- The upper end of the :chain 'isconnected to the bracket 14'and is engaged with ya vshoulder 142VL of the `bracket to .prevent buckling of the'chain,

AS. will be seenk in Figure 2, as the pivotal and the roller and the point 15 is for the chain to drop continuously, or sag and this sagging tendency will keep the chain in its stili position and prevent it from buckling, because if the chain passes over a line drawn between the pivotal center l5 and the point between the centers of the aides v21 and 23, Vit would tend to buckle and collapse.

rlhus l am able to provide a lift that Acan be positively elevated and y,positively returned without the necessity of usinga counter-balvancetruck body. l eliminate the necessity of having long elevating levers, shock absorbing cylinders and hydraulic elevating mechanism, all of which kinds of mechanism tend to put the truck body so high that it is top-heavy.

I desire to comprehend within'my invention such modifications as may be clearly embraced within iny kclaims and the scope of my invention.

Having thus fully described my invention, what I claim is new and desire to'secure by Letters Patent, is:

1. In combination, a supplementary frame,

a truck frame supporting said supplementary a frame, a dump body pivoted on the supplementary frame, an actuating gear' suspended from said supplementary frame, an articulated elevating and lowering member having teeth on v,one sideiadapted to engage a with a part of said gear, -means for attaching said articulated member to saidA dump body and said articulated member being adapted to flex in one direction and to be iniiexible in the other direction, means including a swinging roller to guide and maintain said articulated member in inflexible position from the point of its .engagement with the actuating gear to the point of its attachment to the body, and means lfor'providing a nesting space for that portionof the articulated member which is inoperative.

2. In combination, a supplementary frame, a truck frame supporting said supplementary frame, a dump body'fpivoted on the sup#v plementary frame, an actuating gear suspended from said supplementary frame, an articulated elevating and lowering member having teeth on one side adapted to engage with a part ot said gear, means for attachi ing said articulated member tosaid dump body and said articulated member being adaptedto flex in one direction and to be inflexible-inthe other direction, means includl ing a swingingroller to guide and maintain saidl articulated member in inflexible position from the Vpoint of its engagement with the actuatinggear to the point of its attachment to the body, ymeans for providing anesting space for-that portionofthe-'articulated member whichgis inoperative, and means to render inoperative .said actuatingfmeans.

3. In combination, a supplementary-frame,

f a truck frame supporting saidsu'pplementary frame, a dump body--pivoted onthe-sup.-;

l Ut) lill 50 tween said transverse members and parallel plementary frame, a gear suspended from said supplementary frame, an articulated elevating and lowering member having teeth on one side adapted to engage with a part of said gear, means for attaching said articulated member to said dump body and said articulated member being adapted to flex in one direction and to be inflexible in the other direction, means including-a swinging roller Vto guide and maintain said articulated mem-v verse members on the supplementary frame for supporting the forward end of the dump body, a toothed member attached to the forward end of the dump body, adapted to be nested within said supplementary frame when in inoperative position, a transverse shaft located between said body and said supplementary frame, a pinion thereon for engaging the said member, fore and aft supporting members adapted to support bearings or said transverse shaft carrying said pinion, links carried by said shaft for supporting a roller, and a grooved roller for engaging with the one wall of said toothed member for guiding it into engagement with said pinion.

5. In combination, a supporting frame, a dump body pivoted thereon at one end thereof, transverse spaced members mounted across the other end in said frame adapted to support the other end of said body, a linked toothed elevating and lowering `member attached to the forward end of said body adapted to pass between said transverse members to be nested in said frame, a pinion Vengaging said toothed member, a grooved roller adapted to engage the other side of said pinion, a transverse shaft located betherewith carrying said pinion, fore and aft supporting members between the sidesof said frame supported by said transverse l members, bearing sleeves mounted thereon for supporting the shaft carrying said pinion, link members connecting said shaft and said roller, and means for driving said transverse shaft in either direction.

In testimony whereof, I aflix my signature. i RALPH E. SMITH. 

